Attachment for radiator-caps.



E. l. OSWALD 6L G. W. CONNER. ATTACHMEN FOR RAUM-[0R CAPS.

APPHCAUQN mw JAN. 3, |916.

1 ,200,643; Patented oct. 10,1916.

Urn'rED sTATEs PATENT oEEIoE;

EDWARD J'. OSV'ALD AND GEORGE W. CONNER, 0F PQRTILAND,'OREGON.

ATTACHMENT FOR RADIATOR-CAPS.

1 o au wnom. it may concern:

Be it known that we, EDWARD' J. OswALo and. GEORGE W. CONNER, both citizens of the United States, and residents'of the city of 5f Portland, in the county of Multnomah and ing' of the temperaturel when this becomes too high for the economical and safe running of the' engine, but also provides a compact and ornamental attachment that can be placed on the radiator capl of any automobile which will automatically flash a light as a warning signal whenever the temperature reaches the danger point and which will remain lighted and continue to give` this warning )ust oas long as such a condition' exists.

Figure is a vertical or longitudinal section, showing the details of construction; Fig. 2 is in the nature of a perspective show- 35 ing the ornamental appearance and outward i n of' the radiator attachment; Fig. 3 ws diagrammatically the wiring which connects the battery, the electrical thermometer and the incandescent lamp.

The electrical thermometer 1 is firmly arxedon the inside ofthe brass tube or nig 13, forming the leg of the device. drawings are full size and the dimen-V is may be taken therefrom without any further description. A short distance above the bulb of the thermometer, a rubber washer 1.6 is placed andthe space between this washer and the top of the bulb is filled with cement. The holes 18 allow free circulation of the water or heated air around bulb 1. Another rubber washer or piece of tubing .is placed around the thermometer stem at 15, not only to hold it in position inside the casing 13, but also to insulate the two electrical contacts 2 and 3., which pierce the capillary tube s o that the mercury may It'has for its object net only the register- Specification of Letters Patent. i Patented Oct, 10,=1 9.1'6 Application tiled January 3, 1916. SerialNo. 69,803.

come into contact with themf This g 13 has a shoulder 20, just above thegthreaded part, and a nut. 14 tofasten it firmly to the radiator cap, a hole being vbored inthe latter and tapped Iand the signal attachment screwed into it and locked ,by the jam nut 14. This shoulder 2O and the vthreaded part of the casing could be madelarger so as to form a radiator cap, taking the place'or'v the" cap removed from the radiator. Bushings vof insulating materiaL'll and 12, aregfitted i to the top part of the casing 13 and are held in place by the Washer crean-10, which is screwed to the threaded top part of the* casing and has an internal shoulder which engages the insulating bushing 11. Thisilatter bushing holds the small lamp socket .7, lwith its small incandescent lamp 8.

The spherical vcover part 9 is shown in the drawing as fittin over 10, but .this may be, and preferably 1s, made' an integral part thereof, so that part 9 would screw on to the top ot casing 13, forming `the capfor same.'

The wiring is quite simple-' The contact- Y 3 is connectedwith onexterininal of the lamp socket; the contact 2 is'conneeted with oneV pole of the battery; and the-'other'pole is connected 'withgthe' other vterminal of: the socket. The wires 4 and 5, leading from the' device to the battery pass throughs. hushed opening in the side ofthefcasing 13. YIf so vdesired the lamp may be placed on the dashboard of the automobile and the wiring changed accordingly.

lrVhen the attachment is screwed into the radiator cap, with the thermometer leg on the inside of the radiator and the electrical connections made, the thermometer will at once record the temperature of any circulating Water or heated air.wi'th which it may come in Contact. The contacts 2 and 3 are so placed. in the thermometer that contact 3 indicates a temperature above which it is not advisable to allowl the water in the circulating system to reach.l This is usually fixed at 180 degrees Fahrenheit and so we can place contact 3 at 180 degrees and the contact 2 at ten degrees less or 170 degrees. lhen the heat in the radiator at the place where the device is attached reaches 180 degrecs, the column of mercury in the ther mometer will rise, passing the 170 mark, or contactl 2,an l will finally reach 180 degrees, or the second contact 3. The 'electrical circuit will then be completed by the column of .mercury between contacts 2 and 3, the

inclosed in a tube which is open at the botsmall incandescent lamp 8 Will become energized and the light shining out through opening 19 ci the cover, Will notify the operator tha'twthe circulation of the Water in' the cooling System of the engine is for some -reason defective and this light Will con-` tiuue as a Warning until the temperature tom, but sealed just above the bulb of the thermometer; an insulated lamp socket and electric lamp located in a chamber or en-- larged section of the tube and forming its l top part, the cover thereof having a small opening therein on the side; and means for connecting the contacts ofthe thermometer and the terminals of the lamp socket with j, 'battery so that when the mercury reachesva 'certain height in the capillary tube the electric circuit will be closed.

' 2.1111 an indicating device for radiators of the class described',the combination of an electric thermometer inclosed in a tube, the top. part of which forms a radiator cap, the lower end of the tube .being open-and an electric lamp connected with the contacts of the thermometer and with a source of electrical energy, so that when the column of mercury in the capillary tube of the thermometer reaches `a certain height the circuit will be closed.

EDWARD Ji OSWALD. GEORGE W.-CONNER. VVi'tnesses:

WV. FoLEr,

HARRISON l ALLEN. 

